| /* |
| * Server-side file mapping management |
| * |
| * Copyright (C) 1999 Alexandre Julliard |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| #include "config.h" |
| #include "wine/port.h" |
| |
| #include <assert.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/stat.h> |
| #ifdef HAVE_SYS_MMAN_H |
| # include <sys/mman.h> |
| #endif |
| #include <unistd.h> |
| |
| #include "ntstatus.h" |
| #define WIN32_NO_STATUS |
| #include "windef.h" |
| #include "winternl.h" |
| |
| #include "file.h" |
| #include "handle.h" |
| #include "thread.h" |
| #include "request.h" |
| #include "security.h" |
| |
| /* list of memory ranges, used to store committed info */ |
| struct ranges |
| { |
| unsigned int count; |
| unsigned int max; |
| struct range |
| { |
| file_pos_t start; |
| file_pos_t end; |
| } ranges[1]; |
| }; |
| |
| struct mapping |
| { |
| struct object obj; /* object header */ |
| mem_size_t size; /* mapping size */ |
| int protect; /* protection flags */ |
| struct fd *fd; /* fd for mapped file */ |
| int header_size; /* size of headers (for PE image mapping) */ |
| client_ptr_t base; /* default base addr (for PE image mapping) */ |
| struct ranges *committed; /* list of committed ranges in this mapping */ |
| struct file *shared_file; /* temp file for shared PE mapping */ |
| struct list shared_entry; /* entry in global shared PE mappings list */ |
| }; |
| |
| static void mapping_dump( struct object *obj, int verbose ); |
| static struct object_type *mapping_get_type( struct object *obj ); |
| static struct fd *mapping_get_fd( struct object *obj ); |
| static unsigned int mapping_map_access( struct object *obj, unsigned int access ); |
| static void mapping_destroy( struct object *obj ); |
| static enum server_fd_type mapping_get_fd_type( struct fd *fd ); |
| |
| static const struct object_ops mapping_ops = |
| { |
| sizeof(struct mapping), /* size */ |
| mapping_dump, /* dump */ |
| mapping_get_type, /* get_type */ |
| no_add_queue, /* add_queue */ |
| NULL, /* remove_queue */ |
| NULL, /* signaled */ |
| NULL, /* satisfied */ |
| no_signal, /* signal */ |
| mapping_get_fd, /* get_fd */ |
| mapping_map_access, /* map_access */ |
| default_get_sd, /* get_sd */ |
| default_set_sd, /* set_sd */ |
| no_lookup_name, /* lookup_name */ |
| no_open_file, /* open_file */ |
| fd_close_handle, /* close_handle */ |
| mapping_destroy /* destroy */ |
| }; |
| |
| static const struct fd_ops mapping_fd_ops = |
| { |
| default_fd_get_poll_events, /* get_poll_events */ |
| default_poll_event, /* poll_event */ |
| no_flush, /* flush */ |
| mapping_get_fd_type, /* get_fd_type */ |
| no_fd_ioctl, /* ioctl */ |
| no_fd_queue_async, /* queue_async */ |
| default_fd_reselect_async, /* reselect_async */ |
| default_fd_cancel_async /* cancel_async */ |
| }; |
| |
| static struct list shared_list = LIST_INIT(shared_list); |
| |
| #ifdef __i386__ |
| |
| /* These are always the same on an i386, and it will be faster this way */ |
| # define page_mask 0xfff |
| # define page_shift 12 |
| # define init_page_size() do { /* nothing */ } while(0) |
| |
| #else /* __i386__ */ |
| |
| static int page_shift, page_mask; |
| |
| static void init_page_size(void) |
| { |
| int page_size; |
| # ifdef HAVE_GETPAGESIZE |
| page_size = getpagesize(); |
| # else |
| # ifdef __svr4__ |
| page_size = sysconf(_SC_PAGESIZE); |
| # else |
| # error Cannot get the page size on this platform |
| # endif |
| # endif |
| page_mask = page_size - 1; |
| /* Make sure we have a power of 2 */ |
| assert( !(page_size & page_mask) ); |
| page_shift = 0; |
| while ((1 << page_shift) != page_size) page_shift++; |
| } |
| #endif /* __i386__ */ |
| |
| #define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask) |
| |
| |
| /* extend a file beyond the current end of file */ |
| static int grow_file( int unix_fd, file_pos_t new_size ) |
| { |
| static const char zero; |
| off_t size = new_size; |
| |
| if (sizeof(new_size) > sizeof(size) && size != new_size) |
| { |
| set_error( STATUS_INVALID_PARAMETER ); |
| return 0; |
| } |
| /* extend the file one byte beyond the requested size and then truncate it */ |
| /* this should work around ftruncate implementations that can't extend files */ |
| if (pwrite( unix_fd, &zero, 1, size ) != -1) |
| { |
| ftruncate( unix_fd, size ); |
| return 1; |
| } |
| file_set_error(); |
| return 0; |
| } |
| |
| /* check if the current directory allows exec mappings */ |
| static int check_current_dir_for_exec(void) |
| { |
| int fd; |
| char tmpfn[] = "anonmap.XXXXXX"; |
| void *ret = MAP_FAILED; |
| |
| fd = mkstemps( tmpfn, 0 ); |
| if (fd == -1) return 0; |
| if (grow_file( fd, 1 )) |
| { |
| ret = mmap( NULL, get_page_size(), PROT_READ | PROT_EXEC, MAP_PRIVATE, fd, 0 ); |
| if (ret != MAP_FAILED) munmap( ret, get_page_size() ); |
| } |
| close( fd ); |
| unlink( tmpfn ); |
| return (ret != MAP_FAILED); |
| } |
| |
| /* create a temp file for anonymous mappings */ |
| static int create_temp_file( file_pos_t size ) |
| { |
| static int temp_dir_fd = -1; |
| char tmpfn[] = "anonmap.XXXXXX"; |
| int fd; |
| |
| if (temp_dir_fd == -1) |
| { |
| temp_dir_fd = server_dir_fd; |
| if (!check_current_dir_for_exec()) |
| { |
| /* the server dir is noexec, try the config dir instead */ |
| fchdir( config_dir_fd ); |
| if (check_current_dir_for_exec()) |
| temp_dir_fd = config_dir_fd; |
| else /* neither works, fall back to server dir */ |
| fchdir( server_dir_fd ); |
| } |
| } |
| else if (temp_dir_fd != server_dir_fd) fchdir( temp_dir_fd ); |
| |
| fd = mkstemps( tmpfn, 0 ); |
| if (fd != -1) |
| { |
| if (!grow_file( fd, size )) |
| { |
| close( fd ); |
| fd = -1; |
| } |
| unlink( tmpfn ); |
| } |
| else file_set_error(); |
| |
| if (temp_dir_fd != server_dir_fd) fchdir( server_dir_fd ); |
| return fd; |
| } |
| |
| /* find the shared PE mapping for a given mapping */ |
| static struct file *get_shared_file( struct mapping *mapping ) |
| { |
| struct mapping *ptr; |
| |
| LIST_FOR_EACH_ENTRY( ptr, &shared_list, struct mapping, shared_entry ) |
| if (is_same_file_fd( ptr->fd, mapping->fd )) |
| return (struct file *)grab_object( ptr->shared_file ); |
| return NULL; |
| } |
| |
| /* return the size of the memory mapping and file range of a given section */ |
| static inline void get_section_sizes( const IMAGE_SECTION_HEADER *sec, size_t *map_size, |
| off_t *file_start, size_t *file_size ) |
| { |
| static const unsigned int sector_align = 0x1ff; |
| |
| if (!sec->Misc.VirtualSize) *map_size = ROUND_SIZE( sec->SizeOfRawData ); |
| else *map_size = ROUND_SIZE( sec->Misc.VirtualSize ); |
| |
| *file_start = sec->PointerToRawData & ~sector_align; |
| *file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align; |
| if (*file_size > *map_size) *file_size = *map_size; |
| } |
| |
| /* add a range to the committed list */ |
| static void add_committed_range( struct mapping *mapping, file_pos_t start, file_pos_t end ) |
| { |
| unsigned int i, j; |
| struct range *ranges; |
| |
| if (!mapping->committed) return; /* everything committed already */ |
| |
| for (i = 0, ranges = mapping->committed->ranges; i < mapping->committed->count; i++) |
| { |
| if (ranges[i].start > end) break; |
| if (ranges[i].end < start) continue; |
| if (ranges[i].start > start) ranges[i].start = start; /* extend downwards */ |
| if (ranges[i].end < end) /* extend upwards and maybe merge with next */ |
| { |
| for (j = i + 1; j < mapping->committed->count; j++) |
| { |
| if (ranges[j].start > end) break; |
| if (ranges[j].end > end) end = ranges[j].end; |
| } |
| if (j > i + 1) |
| { |
| memmove( &ranges[i + 1], &ranges[j], (mapping->committed->count - j) * sizeof(*ranges) ); |
| mapping->committed->count -= j - (i + 1); |
| } |
| ranges[i].end = end; |
| } |
| return; |
| } |
| |
| /* now add a new range */ |
| |
| if (mapping->committed->count == mapping->committed->max) |
| { |
| unsigned int new_size = mapping->committed->max * 2; |
| struct ranges *new_ptr = realloc( mapping->committed, offsetof( struct ranges, ranges[new_size] )); |
| if (!new_ptr) return; |
| new_ptr->max = new_size; |
| ranges = new_ptr->ranges; |
| mapping->committed = new_ptr; |
| } |
| memmove( &ranges[i + 1], &ranges[i], (mapping->committed->count - i) * sizeof(*ranges) ); |
| ranges[i].start = start; |
| ranges[i].end = end; |
| mapping->committed->count++; |
| } |
| |
| /* find the range containing start and return whether it's committed */ |
| static int find_committed_range( struct mapping *mapping, file_pos_t start, mem_size_t *size ) |
| { |
| unsigned int i; |
| struct range *ranges; |
| |
| if (!mapping->committed) /* everything is committed */ |
| { |
| *size = mapping->size - start; |
| return 1; |
| } |
| for (i = 0, ranges = mapping->committed->ranges; i < mapping->committed->count; i++) |
| { |
| if (ranges[i].start > start) |
| { |
| *size = ranges[i].start - start; |
| return 0; |
| } |
| if (ranges[i].end > start) |
| { |
| *size = ranges[i].end - start; |
| return 1; |
| } |
| } |
| *size = mapping->size - start; |
| return 0; |
| } |
| |
| /* allocate and fill the temp file for a shared PE image mapping */ |
| static int build_shared_mapping( struct mapping *mapping, int fd, |
| IMAGE_SECTION_HEADER *sec, unsigned int nb_sec ) |
| { |
| unsigned int i; |
| mem_size_t total_size; |
| size_t file_size, map_size, max_size; |
| off_t shared_pos, read_pos, write_pos; |
| char *buffer = NULL; |
| int shared_fd; |
| long toread; |
| |
| /* compute the total size of the shared mapping */ |
| |
| total_size = max_size = 0; |
| for (i = 0; i < nb_sec; i++) |
| { |
| if ((sec[i].Characteristics & IMAGE_SCN_MEM_SHARED) && |
| (sec[i].Characteristics & IMAGE_SCN_MEM_WRITE)) |
| { |
| get_section_sizes( &sec[i], &map_size, &read_pos, &file_size ); |
| if (file_size > max_size) max_size = file_size; |
| total_size += map_size; |
| } |
| } |
| if (!total_size) return 1; /* nothing to do */ |
| |
| if ((mapping->shared_file = get_shared_file( mapping ))) return 1; |
| |
| /* create a temp file for the mapping */ |
| |
| if ((shared_fd = create_temp_file( total_size )) == -1) return 0; |
| if (!(mapping->shared_file = create_file_for_fd( shared_fd, FILE_GENERIC_READ|FILE_GENERIC_WRITE, 0 ))) |
| return 0; |
| |
| if (!(buffer = malloc( max_size ))) goto error; |
| |
| /* copy the shared sections data into the temp file */ |
| |
| shared_pos = 0; |
| for (i = 0; i < nb_sec; i++) |
| { |
| if (!(sec[i].Characteristics & IMAGE_SCN_MEM_SHARED)) continue; |
| if (!(sec[i].Characteristics & IMAGE_SCN_MEM_WRITE)) continue; |
| get_section_sizes( &sec[i], &map_size, &read_pos, &file_size ); |
| write_pos = shared_pos; |
| shared_pos += map_size; |
| if (!sec[i].PointerToRawData || !file_size) continue; |
| toread = file_size; |
| while (toread) |
| { |
| long res = pread( fd, buffer + file_size - toread, toread, read_pos ); |
| if (!res && toread < 0x200) /* partial sector at EOF is not an error */ |
| { |
| file_size -= toread; |
| break; |
| } |
| if (res <= 0) goto error; |
| toread -= res; |
| read_pos += res; |
| } |
| if (pwrite( shared_fd, buffer, file_size, write_pos ) != file_size) goto error; |
| } |
| free( buffer ); |
| return 1; |
| |
| error: |
| release_object( mapping->shared_file ); |
| mapping->shared_file = NULL; |
| free( buffer ); |
| return 0; |
| } |
| |
| /* retrieve the mapping parameters for an executable (PE) image */ |
| static int get_image_params( struct mapping *mapping, int unix_fd ) |
| { |
| IMAGE_DOS_HEADER dos; |
| IMAGE_SECTION_HEADER *sec = NULL; |
| struct |
| { |
| DWORD Signature; |
| IMAGE_FILE_HEADER FileHeader; |
| union |
| { |
| IMAGE_OPTIONAL_HEADER32 hdr32; |
| IMAGE_OPTIONAL_HEADER64 hdr64; |
| } opt; |
| } nt; |
| off_t pos; |
| int size; |
| |
| /* load the headers */ |
| |
| if (pread( unix_fd, &dos, sizeof(dos), 0 ) != sizeof(dos)) goto error; |
| if (dos.e_magic != IMAGE_DOS_SIGNATURE) goto error; |
| pos = dos.e_lfanew; |
| |
| size = pread( unix_fd, &nt, sizeof(nt), pos ); |
| if (size < sizeof(nt.Signature) + sizeof(nt.FileHeader)) goto error; |
| /* zero out Optional header in the case it's not present or partial */ |
| if (size < sizeof(nt)) memset( (char *)&nt + size, 0, sizeof(nt) - size ); |
| if (nt.Signature != IMAGE_NT_SIGNATURE) goto error; |
| |
| switch (nt.opt.hdr32.Magic) |
| { |
| case IMAGE_NT_OPTIONAL_HDR32_MAGIC: |
| mapping->size = ROUND_SIZE( nt.opt.hdr32.SizeOfImage ); |
| mapping->base = nt.opt.hdr32.ImageBase; |
| mapping->header_size = nt.opt.hdr32.SizeOfHeaders; |
| break; |
| case IMAGE_NT_OPTIONAL_HDR64_MAGIC: |
| mapping->size = ROUND_SIZE( nt.opt.hdr64.SizeOfImage ); |
| mapping->base = nt.opt.hdr64.ImageBase; |
| mapping->header_size = nt.opt.hdr64.SizeOfHeaders; |
| break; |
| default: |
| goto error; |
| } |
| |
| /* load the section headers */ |
| |
| pos += sizeof(nt.Signature) + sizeof(nt.FileHeader) + nt.FileHeader.SizeOfOptionalHeader; |
| size = sizeof(*sec) * nt.FileHeader.NumberOfSections; |
| if (pos + size > mapping->size) goto error; |
| if (pos + size > mapping->header_size) mapping->header_size = pos + size; |
| if (!(sec = malloc( size ))) goto error; |
| if (pread( unix_fd, sec, size, pos ) != size) goto error; |
| |
| if (!build_shared_mapping( mapping, unix_fd, sec, nt.FileHeader.NumberOfSections )) goto error; |
| |
| if (mapping->shared_file) list_add_head( &shared_list, &mapping->shared_entry ); |
| |
| mapping->protect = VPROT_IMAGE; |
| free( sec ); |
| return 1; |
| |
| error: |
| free( sec ); |
| set_error( STATUS_INVALID_FILE_FOR_SECTION ); |
| return 0; |
| } |
| |
| static struct object *create_mapping( struct directory *root, const struct unicode_str *name, |
| unsigned int attr, mem_size_t size, int protect, |
| obj_handle_t handle, const struct security_descriptor *sd ) |
| { |
| struct mapping *mapping; |
| struct file *file; |
| struct fd *fd; |
| int access = 0; |
| int unix_fd; |
| struct stat st; |
| |
| if (!page_mask) init_page_size(); |
| |
| if (!(mapping = create_named_object_dir( root, name, attr, &mapping_ops ))) |
| return NULL; |
| if (get_error() == STATUS_OBJECT_NAME_EXISTS) |
| return &mapping->obj; /* Nothing else to do */ |
| |
| if (sd) default_set_sd( &mapping->obj, sd, OWNER_SECURITY_INFORMATION| |
| GROUP_SECURITY_INFORMATION| |
| DACL_SECURITY_INFORMATION| |
| SACL_SECURITY_INFORMATION ); |
| mapping->header_size = 0; |
| mapping->base = 0; |
| mapping->fd = NULL; |
| mapping->shared_file = NULL; |
| mapping->committed = NULL; |
| |
| if (protect & VPROT_READ) access |= FILE_READ_DATA; |
| if (protect & VPROT_WRITE) access |= FILE_WRITE_DATA; |
| |
| if (handle) |
| { |
| const unsigned int sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE; |
| unsigned int mapping_access = FILE_MAPPING_ACCESS; |
| |
| if (!(protect & VPROT_COMMITTED)) |
| { |
| set_error( STATUS_INVALID_PARAMETER ); |
| goto error; |
| } |
| if (!(file = get_file_obj( current->process, handle, access ))) goto error; |
| fd = get_obj_fd( (struct object *)file ); |
| |
| /* file sharing rules for mappings are different so we use magic the access rights */ |
| if (protect & VPROT_IMAGE) mapping_access |= FILE_MAPPING_IMAGE; |
| else if (protect & VPROT_WRITE) mapping_access |= FILE_MAPPING_WRITE; |
| |
| if (!(mapping->fd = get_fd_object_for_mapping( fd, mapping_access, sharing ))) |
| { |
| mapping->fd = dup_fd_object( fd, mapping_access, sharing, FILE_SYNCHRONOUS_IO_NONALERT ); |
| if (mapping->fd) set_fd_user( mapping->fd, &mapping_fd_ops, NULL ); |
| } |
| release_object( file ); |
| release_object( fd ); |
| if (!mapping->fd) goto error; |
| |
| if ((unix_fd = get_unix_fd( mapping->fd )) == -1) goto error; |
| if (protect & VPROT_IMAGE) |
| { |
| if (!get_image_params( mapping, unix_fd )) goto error; |
| return &mapping->obj; |
| } |
| if (fstat( unix_fd, &st ) == -1) |
| { |
| file_set_error(); |
| goto error; |
| } |
| if (!size) |
| { |
| if (!(size = st.st_size)) |
| { |
| set_error( STATUS_MAPPED_FILE_SIZE_ZERO ); |
| goto error; |
| } |
| } |
| else if (st.st_size < size && !grow_file( unix_fd, size )) goto error; |
| } |
| else /* Anonymous mapping (no associated file) */ |
| { |
| if (!size || (protect & VPROT_IMAGE)) |
| { |
| set_error( STATUS_INVALID_PARAMETER ); |
| goto error; |
| } |
| if (!(protect & VPROT_COMMITTED)) |
| { |
| if (!(mapping->committed = mem_alloc( offsetof(struct ranges, ranges[8]) ))) goto error; |
| mapping->committed->count = 0; |
| mapping->committed->max = 8; |
| } |
| if ((unix_fd = create_temp_file( size )) == -1) goto error; |
| if (!(mapping->fd = create_anonymous_fd( &mapping_fd_ops, unix_fd, &mapping->obj, |
| FILE_SYNCHRONOUS_IO_NONALERT ))) goto error; |
| allow_fd_caching( mapping->fd ); |
| } |
| mapping->size = (size + page_mask) & ~((mem_size_t)page_mask); |
| mapping->protect = protect; |
| return &mapping->obj; |
| |
| error: |
| release_object( mapping ); |
| return NULL; |
| } |
| |
| struct mapping *get_mapping_obj( struct process *process, obj_handle_t handle, unsigned int access ) |
| { |
| return (struct mapping *)get_handle_obj( process, handle, access, &mapping_ops ); |
| } |
| |
| /* open a new file handle to the file backing the mapping */ |
| obj_handle_t open_mapping_file( struct process *process, struct mapping *mapping, |
| unsigned int access, unsigned int sharing ) |
| { |
| obj_handle_t handle; |
| struct file *file = create_file_for_fd_obj( mapping->fd, access, sharing ); |
| |
| if (!file) return 0; |
| handle = alloc_handle( process, file, access, 0 ); |
| release_object( file ); |
| return handle; |
| } |
| |
| struct mapping *grab_mapping_unless_removable( struct mapping *mapping ) |
| { |
| if (is_fd_removable( mapping->fd )) return NULL; |
| return (struct mapping *)grab_object( mapping ); |
| } |
| |
| static void mapping_dump( struct object *obj, int verbose ) |
| { |
| struct mapping *mapping = (struct mapping *)obj; |
| assert( obj->ops == &mapping_ops ); |
| fprintf( stderr, "Mapping size=%08x%08x prot=%08x fd=%p header_size=%08x base=%08lx " |
| "shared_file=%p ", |
| (unsigned int)(mapping->size >> 32), (unsigned int)mapping->size, |
| mapping->protect, mapping->fd, mapping->header_size, |
| (unsigned long)mapping->base, mapping->shared_file ); |
| dump_object_name( &mapping->obj ); |
| fputc( '\n', stderr ); |
| } |
| |
| static struct object_type *mapping_get_type( struct object *obj ) |
| { |
| static const WCHAR name[] = {'S','e','c','t','i','o','n'}; |
| static const struct unicode_str str = { name, sizeof(name) }; |
| return get_object_type( &str ); |
| } |
| |
| static struct fd *mapping_get_fd( struct object *obj ) |
| { |
| struct mapping *mapping = (struct mapping *)obj; |
| return (struct fd *)grab_object( mapping->fd ); |
| } |
| |
| static unsigned int mapping_map_access( struct object *obj, unsigned int access ) |
| { |
| if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SECTION_QUERY | SECTION_MAP_READ; |
| if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | SECTION_MAP_WRITE; |
| if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE | SECTION_MAP_EXECUTE; |
| if (access & GENERIC_ALL) access |= SECTION_ALL_ACCESS; |
| return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL); |
| } |
| |
| static void mapping_destroy( struct object *obj ) |
| { |
| struct mapping *mapping = (struct mapping *)obj; |
| assert( obj->ops == &mapping_ops ); |
| if (mapping->fd) release_object( mapping->fd ); |
| if (mapping->shared_file) |
| { |
| release_object( mapping->shared_file ); |
| list_remove( &mapping->shared_entry ); |
| } |
| free( mapping->committed ); |
| } |
| |
| static enum server_fd_type mapping_get_fd_type( struct fd *fd ) |
| { |
| return FD_TYPE_FILE; |
| } |
| |
| int get_page_size(void) |
| { |
| if (!page_mask) init_page_size(); |
| return page_mask + 1; |
| } |
| |
| /* create a file mapping */ |
| DECL_HANDLER(create_mapping) |
| { |
| struct object *obj; |
| struct unicode_str name; |
| struct directory *root = NULL; |
| const struct object_attributes *objattr = get_req_data(); |
| const struct security_descriptor *sd; |
| |
| reply->handle = 0; |
| |
| if (!objattr_is_valid( objattr, get_req_data_size() )) |
| return; |
| |
| sd = objattr->sd_len ? (const struct security_descriptor *)(objattr + 1) : NULL; |
| objattr_get_name( objattr, &name ); |
| |
| if (objattr->rootdir && !(root = get_directory_obj( current->process, objattr->rootdir, 0 ))) |
| return; |
| |
| if ((obj = create_mapping( root, &name, req->attributes, req->size, req->protect, req->file_handle, sd ))) |
| { |
| if (get_error() == STATUS_OBJECT_NAME_EXISTS) |
| reply->handle = alloc_handle( current->process, obj, req->access, req->attributes ); |
| else |
| reply->handle = alloc_handle_no_access_check( current->process, obj, req->access, req->attributes ); |
| release_object( obj ); |
| } |
| |
| if (root) release_object( root ); |
| } |
| |
| /* open a handle to a mapping */ |
| DECL_HANDLER(open_mapping) |
| { |
| struct unicode_str name; |
| struct directory *root = NULL; |
| struct mapping *mapping; |
| |
| get_req_unicode_str( &name ); |
| if (req->rootdir && !(root = get_directory_obj( current->process, req->rootdir, 0 ))) |
| return; |
| |
| if ((mapping = open_object_dir( root, &name, req->attributes, &mapping_ops ))) |
| { |
| reply->handle = alloc_handle( current->process, &mapping->obj, req->access, req->attributes ); |
| release_object( mapping ); |
| } |
| |
| if (root) release_object( root ); |
| } |
| |
| /* get a mapping information */ |
| DECL_HANDLER(get_mapping_info) |
| { |
| struct mapping *mapping; |
| struct fd *fd; |
| |
| if ((mapping = get_mapping_obj( current->process, req->handle, req->access ))) |
| { |
| reply->size = mapping->size; |
| reply->protect = mapping->protect; |
| reply->header_size = mapping->header_size; |
| reply->base = mapping->base; |
| reply->shared_file = 0; |
| if ((fd = get_obj_fd( &mapping->obj ))) |
| { |
| if (!is_fd_removable(fd)) |
| reply->mapping = alloc_handle( current->process, mapping, 0, 0 ); |
| release_object( fd ); |
| } |
| if (mapping->shared_file) |
| { |
| if (!(reply->shared_file = alloc_handle( current->process, mapping->shared_file, |
| GENERIC_READ|GENERIC_WRITE, 0 ))) |
| { |
| if (reply->mapping) close_handle( current->process, reply->mapping ); |
| } |
| } |
| release_object( mapping ); |
| } |
| } |
| |
| /* get a range of committed pages in a file mapping */ |
| DECL_HANDLER(get_mapping_committed_range) |
| { |
| struct mapping *mapping; |
| |
| if ((mapping = get_mapping_obj( current->process, req->handle, 0 ))) |
| { |
| if (!(req->offset & page_mask) && req->offset < mapping->size) |
| reply->committed = find_committed_range( mapping, req->offset, &reply->size ); |
| else |
| set_error( STATUS_INVALID_PARAMETER ); |
| |
| release_object( mapping ); |
| } |
| } |
| |
| /* add a range to the committed pages in a file mapping */ |
| DECL_HANDLER(add_mapping_committed_range) |
| { |
| struct mapping *mapping; |
| |
| if ((mapping = get_mapping_obj( current->process, req->handle, 0 ))) |
| { |
| if (!(req->size & page_mask) && |
| !(req->offset & page_mask) && |
| req->offset < mapping->size && |
| req->size > 0 && |
| req->size <= mapping->size - req->offset) |
| add_committed_range( mapping, req->offset, req->offset + req->size ); |
| else |
| set_error( STATUS_INVALID_PARAMETER ); |
| |
| release_object( mapping ); |
| } |
| } |
